* <p/>
 * <i>Remember: <code>SmbFile</code>s are immutible and therefore
 * the path associated with this <code>SmbFile</code> object will not
 * change). To access the renamed file it is necessary to construct a
 * new <tt>SmbFile</tt></i>.
 *
 * @param  dest  An <code>SmbFile</code> that represents the new pathname
 * @throws NullPointerException
 *         If the <code>dest</code> argument is <code>null</code>